Restricted file access on Windows in os and net/http (CVE-2022-41720)

Summary

Restricted file access on Windows in os and net/http

Original description

The description as published by the source.

On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp").Open("COM1") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system. With fix applied, the behavior of os.DirFS("") has changed. Previously, an empty root was treated equivalently to "/", so os.DirFS("").Open("tmp") would open the path "/tmp". This now returns an error.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Affected packages

Bitnami golang

[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.18.9"},{"introduced":"1.19.0"},{"fixed":"1.19.4"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-41720 golang-1.15

References

advisory nvd.nist.gov
advisory github.com
web go.dev
web go.dev
web groups.google.com
web pkg.go.dev
web pkg.go.dev